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Li Qian,Cai Pingping,Shen Baolong,Makino Akihiro,Inoue Akihisa 한국자기학회 2011 Journal of Magnetics Vol.16 No.4
In this study, we investigated the glass-forming ability (GFA) and magnetocaloric effect (MCE) of Gd55Co20Al23Si2 bulk glassy alloy. It is found that the addition of 2 at% Si is effective for extension of the supercooled liquid region (ΔTx), the ΔTx is 55 K for the Gd55Co20Al25 glassy alloy, and increases to 79 K for the Gd55Co20Al23Si2 alloy. As a result, Gd55Co20Al23Si2 glassy alloys with diameters up to 5 mm were successfully synthesized. The alloys also exhibit large MCE, i.e., the magnetic entropy change (ΔSm) of 8.9 J kg<SUP>?1</SUP> K<SUP>?1</SUP>, the full width at half maximum of the ΔSm (δTFWHM) of 87 K, and the refrigerant capacity (RC) of 774 J kg<SUP>?1</SUP>.